Grinding-disk.



A. A. WARNER.

GRINDING DISK APPLICATION FILED AUG.29,1916.

Patented June 18, 1918.

IN VENTOR. Alonzo A Warner:

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ALONZO A. WARNER, 0F BRITAIN, CONNECTICUT, AS SIGNOB TO LANDEBIS; FRARY 85 CLARILCF NEW BRITAIN, CONNECTICUT, it. CORPORATION OF CONNECTICUT.

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To all. whom it may concern:

Be it known that ll, AnoNzo A. WARNER, a citizen of the United States, and a resident of New Britain, in the County of Hartford, State of Connecticut, have invented certain new and useful Improvements in Grinding- Disks, of which the following is a specification.

Grinding disks are used in pairs set face to face, one of them being stationary and the other revolving, the material to be ground being fed intothe center of the disks and caused to travel outwardly between the faces of the disks, the faces being provided with cutting portions which effectually grind up the material fed to they disks. lit is customary to preliminarily break up the grain or berries rather finely before it reaches the point where it commences to move between the disks. The fineness of the grinding is dependent very largely upon the character of the grinding teeth, and this 1nvention relates to a new and improved 091istruction and arrangement of the grinding teeth, on at least one of the pair of cooperating disks. y

The object of the invention is to insure a regularity in the grinding action to provide for grinding the material extremely fine to prevent the collection and retention of the material in pockets on the face of the grinding disks, and to cause the material to turn as it moves between the grinding disks so as to insure a complete and fine grinding action. Other features of invention will be set forth in the following specification and claims.

Figure 1 is a face view of a disk embodying my invention.

Fig. 2 is a sectional view on the line 22 of Fig. 1.

Fig. 3 is a view similar to Fig. 2, but of a modification.

The face of the grinding disk is divided into a plurality of segments A, each segment being defined by a seriespf ribs 5 extending across the face of the disk, these ribs all being tangential to a circle which is of less diameter than the central openin of the disk. These ribs will be referre to hereinafter as the primary ribs.

Within each segment there is a series of secondary ribs 10, which are parallel to the primary rib defining one side of the segment Specification of Lettersjli'atcnt. Pmb gmfl g dl .Jl'umqg 1%, 191a,,

Application filed August29,1916. Eeriallt'o.1l17,54l9.

and angularly disposed with relation to the primary rib forming the other side of the segment.

This arrangement of the ribs produces a series of grooves in each segment extending in the general direction from the central opening toward the outer edge of the disk, and the bottoms of these grooves are'upthe disk so that as the'material moves in these grooves toward the outeredge of the disk it is continually traveling upward, and the top of thelayer is being constantly subwardly inclined toward the outer edge of jected to the grinding actionof the llbS.

Preferably each groove is stepped one or more times, that is to say, the groove is divided lengthwise into two or more sections by the lands 15, each section inclining upwardlyto theland at its outer end, and these landslie 1n theplane of the ribs. As a result of this arrangement the material fis subjected a plurality of times in the course of its passage from the inner to the outer edge of the disk, to the closest grinding action.

In addition to the upward inclination of the bottoms ofthe grooves toward the lands, one side of the groove is more abruptly inclined than the other, as indicated at 20, which means that as a layer of material travels up the incline, it is twisted or turned so as to certainly bring the parts underneath into the range of action of the ribs,

thus insuring a thorough and complete grinding action. This formation of the bottom of the groove may be defined as an upward and spiral inclination.

This arrangement provides a land which has an irregular surface area, as clearly indicated at 25. ()f course some of the shorter grooves will have but a single land, which will be at the outer end, while the longer grooves may have a single intermediate land orming the groove into two sections, as shown in Figs. 1 and 2, or it may have two or more lands forming the grooves into a plurality of sections as shown in Fig. 3.

In order to facilitate the passage of the ground material from between the disks, find that it is helpful to form the end of each segment on the arc of a circle which is not concentric with the center of the disk, giving to the outer edge of the disk or of the cutting portions of its face, an irregular contour. Obviously the line defining the In accordance with the provisions ofthe' patent statutes. I have described-the principle of operation of my invention, together with the apparatus which I now consider" to represent the best embodiment thereof;

but I desire" to have it understood that the apparatus shown is only illustrative, and.

that the invention can be carried out by other-means, I i

I claimas-my invention: v l 1. A grinding disk having a face.- provided-with a; plurality of. segments defined by aseries; of primary cutting ribs; secondary ribs in each segment spaced apart to form straight grooves, the bottoms of said grooves. being upwardly and spirally inclined toward the outer-edge of said; disk. I 2, A. grinding disk ;l 1av i ng a face provided with aeplnrality of? segmentsdefined byna seriesot primary cutting; ribs; secondary ribs in each segment forming straight grooves, one or vmore transversedivision wallsin said groove rising to the plane of thefaces, of said ribs dividing the grooves lengthwise into, a plurality oi v sections, the bbttom'of eachsection being upwardly, and sp rally in lin d to ard he O e edgeof said'.- disk. p p

. 3. A grinding disk having a faceprovided with a 'pluralityof segments defined by a cutting ribs in each segment forming grooves; a land of irregular surface formed in. each groove in the planeof the faces of :the ribs, the bottoms of the grooves being upwardly inclined toward said lands.

'4. A grinding disk provided .in one face with cutting ribs arranged in a plurality ol" segments, said cutting ribs being spaced from .oneanother to form grooves between them, the bottoms of said grooves being upwardly and outwardly inclined, and one side of the bottom of said groovcs'bcing more abruptly inclined than the other.

An annular grinding disk having its face divided into a plurality of segments, primary cutting ribs defining said segmei'lts,

.all; of said ribs being tangential to a circle of smaller diameter than the inner edge of the disk, secondary cutting ribs in each segment.parallelwith one of said primary cutting ribs and spaced apart to form grooves, and lands arranged between and 111 the plane of the faces of said ribs, the bottoms of the seotionsof said grooves beingupwardly and spirallyinclined to the land at the outer end of each section.

, 6. A grinding disk having a face provided with a, plurality of segments defined by a series of primary cutting ribs, the outer boundary of each segment arranged at an angle to the periphery of said disk.

. ALONZO A. WARNER.

' Copies of this patent nayvbe obtained for five cents each, by. addressing the Commissioner of Patents,

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